Spam Twin Strike and Rift Disturbance for AOE, but still using Deadly Strike as a finisher (makes your next Twin Strikes hit harder, and does more damage than just using Compund Attack).

Also, for that build you linked, lose Dancing Steel and Disengage, ditch Rift Barrier (the amount of damage you reflect is pathetic) and get Ruthless Stalker and Improved Rift Guard. That'll put you up to 20RS and get you Shadow Blitz, which should give you three plane shifts each on a 25-second cooldown and let you chain your shifts together to keep a 100% uptime on the Stalker Phase/Ruthless Stalker buffs.

If you're mostly solo farming, you might want to lose another point from BD and grab Planar Vortex - it's broken as hell for AOE farming, and with the deflect from Guardian Phase and a tank trinket like Arkryon's Mirror you pretty much can't die against melee mobs.

This is the best build i have ever made for soloing. In the guide in my Signature there is a whole section on how to play it, as well there are a TON of builds for DPS in there. If you are just returning though, the build i would recommend for dungeons is "Blink Blade", which is almost exactly the same as the solo build i linked, but with a few points moved around.